Anti-theft electronic tag with laser decoding point
Patent Information
- Application Number
- CN202522005300.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-18
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-09-18
AI Technical Summary
现有技术缺点是解码点一致性不是很好，解码高度一致性比较难控制、机械式生产效率不高、且机械式解码头（针）在频繁机械式工作中容易磨损，导致电子标签解码点不良，影响产品解码性能及生产良率
[0008]本实用新型通过使用激光技术，在电子标签的电容面或线圈面的电容上做激光解码点。激光具有单色性好、相干性好、方向性好和能量高等特点，将激光照射在电子标签的电容上，使铝箔在高温下融化并形成一个凹点，此凹点处于电容面与线圈面似通非通的临界状态，当电子标签在电磁场中感应时，产生高压放电将解码点击穿，使标签失去性能。
Smart Images
Figure CN224651875U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anti-theft electronic tags (EAS tags), and in particular to an anti-theft electronic tag with laser decoding points. Background Technology
[0002] Electronic tags mainly consist of a coil side, a film layer, and a capacitor side, which are bonded together with adhesive. The coil side (the side primarily containing the coil circuit and part of the capacitor circuit) and the capacitor side (the side primarily containing part of the capacitor circuit) are connected by their aluminum foil layers to form an LC resonant circuit, as shown in the attached diagram. Figure 1 This LC oscillation circuit, under the influence of a spatial electromagnetic field, can generate LC oscillations through electromagnetic induction, emitting a specific frequency radio frequency signal. This signal is then recognized by a corresponding antenna system, triggering an alarm and achieving anti-theft functionality. Electronic tags can be designed with circuits of different sizes, shapes, and thicknesses to achieve varying tag performance and recognition strength.
[0003] Electronic tag decoding involves creating a decoding point on the tag's capacitor. When the tag senses a magnetic field, this decoding point generates a high-voltage discharge, which breaks down the thin film at the decoding point, causing the tag's capacitor surface to conduct with the coil surface, resulting in a short circuit and thus the electronic tag losing its ability to feed back electromagnetic signals.
[0004] Current technology uses a heated decoding head (pin) to mechanically reciprocate up and down to create a decoding point on a capacitor. This decoding point requires creating a concave shape in the aluminum foil on the capacitor surface, and the film of the electronic tag must not be punctured during the decoding process. The disadvantages of this technology are: inconsistent decoding points, difficulty in controlling decoding height consistency, low mechanical production efficiency, and the mechanical decoding head (pin) is prone to wear during frequent mechanical operation, leading to defective decoding points on the electronic tag, thus affecting product decoding performance and production yield.
[0005] Existing mechanical decoding points are circular, but their circular shape is easily affected by wear on the decoding head (pins), resulting in irregular circles, unevenness, and inconsistent appearance. Figure 2 . Utility Model Content
[0006] The purpose of this utility model is to provide an anti-theft electronic tag with laser decoding points, which mainly solves the problems existing in the prior art. The processing precision, quality, speed and appearance consistency of the laser decoding points of the electronic tag of this utility model are higher, while making the performance of the electronic tag more stable and reliable.
[0007] The specific technical solution of this utility model is as follows: An anti-theft electronic tag with a laser decoding point includes a thin film layer and a first metal circuit layer and a second metal circuit layer disposed on both sides of the thin film layer; the first metal circuit layer includes a first capacitor plate, a coil and a first connecting line, and the second metal circuit layer includes a second capacitor plate and a second connecting line; the first capacitor plate and the second capacitor plate, the first connecting line and the second connecting line are all correspondingly disposed on both sides of the thin film layer; the tag is characterized in that: a concave point is formed on the first capacitor plate or the second capacitor plate by melting metal material through laser irradiation, and this concave point is the laser decoding point.
[0008] This invention utilizes laser technology to create laser decoding points on the capacitor side or coil side of an electronic tag. Lasers possess characteristics such as high monochromaticity, high coherence, high directionality, and high energy. When the laser is irradiated onto the capacitor of the electronic tag, the aluminum foil melts at high temperature, forming a concave point. This concave point is in a critical state where the capacitor side and coil side are almost connected. When the electronic tag is induced in an electromagnetic field, a high-voltage discharge is generated, breaking down the decoding point and rendering the tag inoperable.
[0009] The laser decoding point of this invention has a good circular shape, and the depression of the decoding point is relatively smooth and uniform, with good consistency. Attached Figure Description
[0010] Figure 1 This is the circuit diagram of the anti-theft electronic tag (i.e., a schematic diagram of an LC oscillation circuit).
[0011] Figure 2 This is an image showing the appearance of the mechanical decoding point of an existing anti-theft electronic tag.
[0012] Figure 3 This is a structural schematic diagram of the anti-theft electronic tag of this utility model.
[0013] Figure 4 This is a schematic diagram of the laser decoding point processing method for the anti-theft electronic tag of this utility model. Figure 1 .
[0014] Figure 5 This is a schematic diagram of the laser decoding point processing method for the anti-theft electronic tag of this utility model. Figure 2 Figure 6 This is an appearance diagram of the laser decoding point of the anti-theft electronic tag of this utility model. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0016] Please see Figure 3 , 4 Figure 5 shows a schematic diagram of an anti-theft electronic tag with laser decoding points. As shown, it includes a thin film layer 2 and a first metal circuit layer 1 and a second metal circuit layer 3 (e.g., the material of the first metal circuit layer 1 and the second metal circuit layer 3 is aluminum foil) disposed on both sides of the thin film layer 2. The first metal circuit layer 1 includes a first capacitor plate, a coil, and a first connecting line, or referred to as the coil surface. The second metal circuit layer 3 includes a second capacitor plate and a second connecting line, or referred to as the capacitor surface. The first and second capacitor plates, the first and second connecting lines, are all correspondingly positioned on both sides of the thin film layer 2. A concave point is formed at the corresponding position on the first and second capacitor plates by melting the metal material through laser irradiation; this concave point is the laser decoding point 4.
[0017] This invention utilizes laser technology to create laser decoding points on the capacitor side or coil side of an electronic tag. Lasers possess characteristics such as high monochromaticity, high coherence, high directionality, and high energy. When the laser is irradiated onto the capacitor of the electronic tag, the aluminum foil melts at high temperature, forming a concave point. This concave point is in a critical state where the capacitor side and coil side are almost connected. When the electronic tag is induced in an electromagnetic field, a high-voltage discharge is generated, breaking down the decoding point and rendering the tag inoperable.
[0018] like Figure 6 As shown, this is a schematic diagram of the laser decoding point. The laser decoding point has a good circular shape, and the depressions within the decoding point are relatively smooth and uniform, exhibiting good consistency.
[0019] Figure 4 During the processing method, the laser beam 5 irradiates from the second metal circuit layer 3 toward the first metal circuit layer 1 and forms the laser decoding point 4 on the second metal circuit layer 3.
[0020] Figure 5 In another processing method, the laser beam 5 irradiates from the first metal circuit layer 1 toward the second metal circuit layer 3 and forms the laser decoding point 4 on the first metal circuit layer 1.
[0021] The two processing methods produce the same result.
[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. An anti-theft electronic tag with laser decoding points, comprising a thin film layer (2) and a first metal circuit layer (1) and a second metal circuit layer (3) disposed on both sides of the thin film layer (2); the first metal circuit layer (1) includes a first capacitor plate, a coil and a first connecting line, and the second metal circuit layer (3) includes a second capacitor plate and a second connecting line; the first capacitor plate and the second capacitor plate, the first connecting line and the second connecting line are all disposed on both sides of the thin film layer (2); characterized in that: A concave point is formed on the first or second capacitor plate after the metal material is melted by laser irradiation. This concave point is the laser decoding point (4).